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Role of the growth parameters on the structural order of MWCNTs produced by arc discharge in liquid nitrogen
Author(s) -
Bagiante Salvatore,
Scalese Silvia,
Scuderi Viviana,
D'Urso Luisa,
Messina Elena,
Compagnini Giuseppe,
Privitera Vittorio
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200982957
Subject(s) - raman spectroscopy , carbon nanotube , scanning electron microscope , materials science , electric arc , transmission electron microscopy , electrode , analytical chemistry (journal) , liquid nitrogen , nitrogen , nanostructure , nanotechnology , composite material , chemistry , optics , organic chemistry , physics
Abstract We report a systematic study of the synthesis of multiwall carbon nanotubes (MWCNTs) by arc‐discharge in liquid nitrogen (LN 2 ). The effect of the variation of the experimental parameters, such as size of electrodes and discharge current, on the formation of nanostructures has been investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. We found that an increase in the electrode size and/or in the discharge current determines a better quality of the nanotubes, as shown by the reduction of the I D / I G ratio in the Raman spectra. In some experimental conditions radial breathing modes (RBMs) have been observed and attributed to nanotubes with small innermost tube diameters.